Concrete-and-metal structure.



PATENTBD JAN. 8, 1907.

No. 840,571f

J. W. LINZBB, JR. CONCRETE' AND METAL STRUCTURE.

APPLICATION FILED SEPT. 2 7- 1905.

UNITED STATESTENT OFFICE.

JOHN W.- LrNZEE,-JR. OF BOSTON, MASSACHUSETTS.

` coNcnETE-AND-METAL siraucrutui.4

Specification of Letters Patent.

I Patented Jan. 8, 1907.

Application nea semester 27,1905. Serial No. 280,308.

tures consisting of concrete, artificial stone,-

vide an eye-rod ofsuch construction that it cement, mortar, terra-cotta, brick, glass, or similar substances having embedded therein rods of steel or similar material possessing great tensile strength relatively to the tensile strength of the concrete Or analogous material.

The invention relates particularly to structures of this character having eye-rods so connected to other rods or reinforcing members as to yform reinforcing skeleton structures which are entirely surrounded by and embedded in the concrete,`cement, &c.

The chief object of. the invention is to vso construct the said eye-rods that they will have substantially the same cross-sectional area and strength at the eyes or apertures as at other points, so thatthey Will lose nothing inv strength by reason of the presence of the eyes, by means of which the rods are connected to other rods or members.

Anotherobject of the invention is to prowill not'only possess adequate strength at 'points vwhere it is united to other rods or members, but will also furnish bearings to anchor the reinforcing structure in the concrete. V

In accordance with my invention those members of a reinforcing structure thatv are provided with eyes for engagement with other members are provided also with enlargements surrounding or adjacent to the eyeorifices, said enlargements compensating for any weakness of the bars due to the presj-v ence of the eye-orifices, and providing anchoring portions to take a bearing on the cement or concrete or on other adjacent metal .structures or members.

In the accompanying drawings, in `which Iv Showsome of the embodiments of the invention, although without attempting to illus? trate all of the usesor utilities of rods or bars constructed in accordance with my invention, Figure 1 `is a longitudinal section` of a floor-beam constructed of concrete and metal' in accordance with my invention. Fig. 2

' represents a section on line 2 2 of Fig. 1.

same.

.which they are intended to meet.

forming a part of the structure shown in Fig.

1. Fig. 4 represents a side elevation of the Fig. 5 represents a'section on line 5 5 of Fig. 4. Fig. 6 is a fragment ary view simi lar to Fig. 1, showing a different structure of trusswork. Fig. 7 is a view looking from one end of Fig. 6. Figs. 8 and 9 are detailed views of different forms'of rods which may be employed in carrying out my invention. l

Since luy-invention relates in 11o way to any particular method of embedding. the metal structure in the cement or concrete, I shall not attempt to refer to or describe the many ways by which the eye-rods hereinafter described may be connected and united and embedded. It is sufficient to state that the metal eye rods or bars b are of such length and forms as will best meet the requirements They may be long or short and will be provided with eyes b wherever such eyes will be required. Said bars or rods b are embedded in concrete or cement a after they have been set up and united with other members to form a skeleton reinforcing structure.

As is well known,- the strain placed on the bars which are included in concrete and metal structures extends longitudinally of the rods. Hence the presence of openingstherei-n which in any way decreases the amount of metal in cross-section at points intermediate the ends of the rod weakens the rod to that extent, regardless of the amount of metal in'cross-sectionat points intermediate the openings, the rod bein no stronger than its weakest part. Whie this weakness can be avoidedv to some extent 1 by the presence of enlargements around the openings or eyes, which enlargeor stress ments are so formed as to provide substan? tiallyl the same quantity of metal in crosssection as is present in the remaining parts of therod, yet there is a constant tendency where heavy longitudinally-extending stress is present toy elongate the openings or eyes and thereby change their shape. -Where this stress is provided during the placing of the concrete -in position, the elongation of the eyes tends to form air-spaces within the l structure when the concrete hardens, and

if'present after the hardening process is complete there is a tendency to crack and break up the adjacent parts of the concrete, neces sarily weakening the. structure. To overcome these objections, I provide .the rods l,

IIO

45 inventionand described a way of constructof any suitable shape in cross-section, with enlargements b2, within which arc placed the openings or eyes b', the openings or eyes be-` The rods may have any desired shape in cross-section, such as round, oval, square, or

polygonal, and they may be either twisted or straight. The eyes and the enlargements formed in any one rod may be in the. same plane as indicated in Figs. 3 and 4 or they may be at different angles relatively to each other, as indicated in Figs. 8 and 9. In said.

Figs. 8 and 9 I have simply illustrated in detai perspective, and side elevation the forms Which may be given to the several eye-rods which are included in the structure illustrated in- F-igs. 6 and 7. It will now be understood that whatever form may be given to the `rods in cross-section the tensile strength of the rods lis substantially equal at all points of their length, and-the enlargementsthereon serveto take a bearing -on the .concrete or cement in which said bars are embedded without the liability of leaving air-,sp aces in the cement at any points around said enlargements. The enlargements may tween the depressions.

beformed by indenting opposite sides of the rod, the metal thus displaced forming protuberances on the intermediate sides or be- In all cases the eyeorifices constitute a simple means for directly connectin a steel reinforcing member to another rein orcing member or members.

Having thus explained the nature of my ing and' using the same, thou h without attempting to set forth all of the orms in which it may be made or all of the modes of its use, what I claim, and desire to secure, is-

1. A concrete-and-metal structure comprising separate reinforci'ng'members embedded in the concrete, some of said members' having eyes through which other members pass, the opening ol the eye being at one side of the longitudinal axis of its member, the eye members being enlarged adjacent to their eyesfwhereby the tensile strength of the v"n'iernbers,ispreserved at the eyes and anchoring portions are'formed.

2. A concrete-and-metal structure comprising separate reinforcing members embedded in the concrete, some of said members having .circular openings or eyes through which other members pass, the receiving portion of the openings or eyes being at one sideof the longitudinal axis of the member, the members having openings or eyes being enlarged adjacent to said openings or eyes whereby the tensile strength of the members is preserved.

3. A concrete-and-metal structure comprising rods having circular eyes and formed with enlargements adjacent to said eyes to prevent breaking of the rods at the eyes, the enlargements and eyes being at one side of the longitudinal axis ofthe rods, whereby the shape of the eyes will not be affected by stress applied lengthwise of the rods, and supplemental members passing through said eyes.

4. A concrete-and-metal structure, comprising separate reinforcing members embedded in the concrete, said members having eyes, the openings of which are located at one side of the' longitudinal axis of the member, said members bein enlarged adjacent to their eyes, said eyes 'rhein g adapted to receive ins or bolts of similar material to the meml'iers, for the urpose of connecting said reinforcin mem'iiers together.

5. concrete-and-metal structure comprising separate reinforcing members embedded in the concrete, said members having a continuous set of eyes, the openings of which are located at one side of the longitudinal axis of the member, said members being enlarged adjacent to their eyes, whereby said eyes furnish a ready, simple, economical and secure means for connecting said members together, at all points of their lengths where said e es occur, without additional work in the iie d.

6. A concrete-and-metal structure, comprising separate reinforcing members embedded in the concrete, said members having eyes, thel openings of which extend therethrough and through which other members ass, said o enings being at one side of the on itudina axis of the reinforcing members, sai members also being enlarged adjacent to their eyes, said eyes beiner all in one plane, or some in one plane and the others in planes making an angle with those in other planes.

In testimony whereof ,I have allixed my `signature in presenceof two witnesses.

, JOHN W. LINZEE, JR. Witnesses:

C. F. BROWN, 'H.L. RonBINs. 

